Improvement in canvas-stretchers



E. H. COLLINS. Canvas Stretcher.

No. 202,330. Patented April 16,1878.

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UNITED STATES PATENT OEEIoE.

EDWARD H. COLLINS, OF DENVER, COLORADO.

IMPROVEMENT IN CANVAS-STRETCHERS.

Specification forming part of Letters Patent No. 202,330, dated April16, 1878; application filed July 26, 1877.

To all whom it may-concern:

Be it known that I, EDWARD H. COLLINS, of the city of Denver, in thecounty of Arapahoe and State of Colorado, have invented a new and usefulImprovement in Stretching Prepared Canvas for Artists Use, whichimprovement is fully set forth in the following specification andaccompanying drawings, in which Figure 1 is a perspective view of onecorner of a frame for stretching prepared canvas, containing a miteredjoint with my metallic loop attached. Fig. 2 is a sectional view ofmitered joint, with groove for wedge and position of metallic loop. Fig.3 is a view of thickness and superficies of wedge. Fig. 4 is a view ofthickness and superficies of metallic loop.

The object of my invention is to furnish a device for stretchingprepared canvas for artists use, in the most simple and economicalmanner, by means of my metallic loop sliding under screw-heads placedacross the mitered joint at right angles opposite to the canvas,

which, with the aid of a wedge between the shoulders of the miter, willproduce any desired tension of the canvas.

In the drawings, A A represent one corner of frame with mitered joint;B, the point of miter; C, the shoulder of miter; D D, my metallic loop;'E, wedge at the shoulder of miter producing tension.

It will be seen by the foregoing that this device may be applied to anyframe for stretchin g canvas for artists use containing a mitered joint.

Having thus described my invention, I claim as new and desire to secureby Letters Patent In a stretcher-frame, the miter-joint B, combined withthe metallic loop D and adjusting screw-heads A, substantially as andfor the purpose set forth.

EDWARD H. COLLINS.

Witn esses WM. P. CALLAWAY, B. C. ADAMS.

